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/*
* vhua.c
*
* Copyright (C) 2011-15 - ntop.org
*
* nDPI is free software: you can vhuatribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* nDPI is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with nDPI. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "ndpi_api.h"
/*
http://www.vhua.com
Skype-like Chinese phone protocol
*/
#ifdef NDPI_PROTOCOL_VHUA
static void ndpi_int_vhua_add_connection(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow) {
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_VHUA);
NDPI_LOG(NDPI_PROTOCOL_VHUA, ndpi_struct, NDPI_LOG_TRACE, "VHUA Found.\n");
}
static void ndpi_check_vhua(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow) {
struct ndpi_packet_struct *packet = &flow->packet;
u_int32_t payload_len = packet->payload_packet_len;
u_char p0[] = { 0x05, 0x14, 0x3a, 0x05, 0x08, 0xf8, 0xa1, 0xb1, 0x03 };
if(payload_len == 0) return; /* Shouldn't happen */
/* Break after 3 packets. */
if((flow->packet_counter > 3)
|| (packet->udp == NULL)
|| (packet->payload_packet_len < sizeof(p0))) {
NDPI_LOG(NDPI_PROTOCOL_VHUA, ndpi_struct, NDPI_LOG_TRACE, "Exclude VHUA.\n");
NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_VHUA);
} else if(memcmp(packet->payload, p0, sizeof(p0)) == 0) {
ndpi_int_vhua_add_connection(ndpi_struct, flow);
}
}
void ndpi_search_vhua(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow) {
struct ndpi_packet_struct *packet = &flow->packet;
NDPI_LOG(NDPI_PROTOCOL_VHUA, ndpi_struct, NDPI_LOG_TRACE, "VHUA detection...\n");
/* skip marked packets */
if(packet->detected_protocol_stack[0] != NDPI_PROTOCOL_VHUA) {
ndpi_check_vhua(ndpi_struct, flow);
}
}
#endif
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